Hangisi Gerçek Defne Yaprağı Uçucu Yağı?

Öz

Bu çalışmada ticari olarak satın alınan onbir adet defne yaprağı uçucu yağı ile laboratuvar koşullarında hidrodestilasyon yöntemi ile elde edilen taze ve kurutulmuş defne yaprağı uçucu yağlarının kimyasal yapıları GC-FID ve GC-MS ile analiz edilmiştir. Analizler sonucunda dokuz ayrı uçucu  yağın kimyasal yapısı aynı bulunurken, üç yağ tamamen farklı bulunmuştur. Uçucu yağlardan birinde ise % 85 oranında isopropil alkol bulunmuştur. 1.8-sineol (% 47.5-59.1) taze örnekler ve bazı yağlarda ana bileşen olarak tespit edilirken, α-terpinilasetat (% 4,7-10,7), sabinen (%2.8-10.4) ve α-pinen (% 5,02-7,25) diğer önemli bileşenlerdir. Diğer bir örneğe ait kimyasal içerik, uçucu yağın defne meyvesine ait olduğunu ve % 33,5 linoleic ve % 30,2 oleic asit içerdiğini göstermiştir. Genel olarak, oksijenli monoterpenhidrokarbonların (% 68,5-77,5) oranı fenilpropanoidlere (% 0,43-2,41) göre yüksek bulunmuştur. Bu da incelenen defne uçucu yağlarının tıbbi amaca daha uygun olduğunu göstermektedir. Ticari olarak tedarik edilen yağların p-simen oranı % 1,49-6,71 arasında bulunmuştur. Bu durum uçucu yağların beklemiş olduğunu göstermektedir.

Anahtar Kelimeler

• Laurus nobilis,defne,uçucu yağ,1,8-sineol

Which is the Real Bay Leaf Essential Oil?

Abstract

In this study, chemical analysis of eleven trade bay leaf essential oil and essential oils obtained by hydrodistilation in the laboratory were done by GC-FID and GC-MS. Chemical composition of  nine bay leaf essential oil were found the same while three bay leaf essential oil were totally different. In one of the samples, the amount of isopropyl alcohol was 85%. In the fresh bay leaf oil and in some trade marks 1.8-cineol (47.5-59.1 %) was found to be the major compound while α-terpinylacetat ( 4,7-10,7%), sabinen (2.8-10.4%) and α-pinen (5,02-7,25%) were the other dominant compounds. In one of the trade samples the results indicate that it is the bay-fruit essential oil not leaf with the composition of 33,5% linoleic acid and 30,2 % oleic acid. Generally, the amount of oxygenated monoterpenhydrocarbons (68,5-77,5%) was higher compared to phenylpropanoids (0,43-2,41%). These results showed that analyzed essential oils were suitable for medical usage. p-cymen (1,49-6,71%) ratio was higher in the trade marks  which indicated that these oils were degraded.

Keywords

• Laurus nobilis,bay,essential oil,18-cineol

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